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By angel_toshkov | Updated: July 12, 2021, 1:51 p.m.

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Welcome to Docker as a Virtualization Platform for Cloud and Edge
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Docker as a Virtualization Platform for Cloud and Edge
Your mission is to Gain general understanding of container-based virtualization concepts and obtain practical experience with using Docker to create and manage containers for easy installation and sharing of applications on different platforms and operating systems.
Your mission
Hello guys.
❏ Learning the basics of virtualization and container technologies 
❏ Getting familiar with Docker as a container-based virtualization tool 
❏ Installing and running Docker on a host PC 
❏ Fetching an application as a bundled Docker image and running it as a virtual machine (container) in Docker 
❏ Monitoring and managing the available images and containers in Docker
Don't forget that your achievements should include the following:
CC-1. Getting started with 
Docker
Docker is a highly popular container-based virtualization tool, which allows you to run the same application or virtual machine on any operating system without having to deal with the libraries and other dependencies required by the application.

This is achieved by bundling the application with a lightweight runtime and all required dependencies in a so-called “container” image.
 
The container image can be easily shared across different systems. Single or multiple instances of this image can be started as a new “virtual machine” (container instance) running in the Docker environment.
Simply download and install the desktop application for your operating system (OS) from the Docker website: https://www.docker.com/products/docker-desktop.

In this module we will focus on a Windows PC, but Linux and Mac versions of Docker are also available and the documentation here applies to those as well after successfully installing the Docker Desktop application on the target OS.

Once the installation is completed, you can start the Docker application by clicking on the Windows Start Menu and start typing Docker. Then the “Docker Desktop” application will appear.                                                 
Step 1: Install and Run Docker Desktop on your PC
When the Docker Desktop application launches, it may start as a minimized tray icon on Windows. If this is the case, you can open up its main application window by double clicking on its icon in the Windows tray area (usually in the right bottom corner of your screen, next to the time on the task bar).

The main application window has a simple interface.

Note that depending on the current version of Docker, this may change. 
On the left panel of Docker window, we see three tabs / pages: • Containers / Apps • Images • Dev Environments 
Step 2: Familiarizing with the User Interface
The Containers / Apps page shows the available application instances that are available for execution in your Docker.

• The first line shows a Node-RED application (container) that is currently running, which is indicated by its green icon and the text “RUNNING” under the container name “mynodered”. This is just a user-given name for the application instance.

• In the third line, we see an Eclipse Kura application, which is an IoT gateway software. This container is currently idle, shown by the gray icon and the status text “EXITED”. You can think of this as a (virtual) machine that is currently turned off. We can easily turn on this machine (the container/app) by clicking on the Start button. 
The Containers / Apps page
• Here we see a list of locally available “image” files that were previously fetched / downloaded from the web.
You can think of each image as the template of an application, which you can then instantiate to create actual running application(s).

• When we hover our mouse over an image item in this list, a “RUN” icon/button appears, allowing us to create a new instance (a new container/app) of this image, as we will later see in the 3rd lab session of this module.  
“Images” page in Docker Desktop
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IO1 Cloud Computing (CC)

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